| CALIBER QUANTITY PER RIFLING TURN | 1 TURN IN 45.000 CALIBERS TO 1 TURN IN 30.000 CALIBERS |
| FSC APPLICATION DATA | CANNON,40MM,DUAL AUTOMATIC GUN |
| GROOVE WIDTH | 0.208 INCHES MINIMUM AND 0.232 INCHES MAXIMUM |
| LAND WIDTH | 0.089 INCHES NOMINAL |
| OVERALL LENGTH | 88.422 INCHES MINIMUM AND 88.734 INCHES MAXIMUM |
| MATERIAL | STEEL |
| RIFLING DIRECTION | RIGHT-HAND |
| RIFLE BORE GROOVE QUANTITY | 16 |
| SIZE DESIGNATION | 40 MILLIMETER |
| SPECIAL FEATURES | YIELD STRENGTH 140 TO 170 KSI |
| WEAPON MODEL NUMBER | M2A1 |
| WEAPON SIZE DESIGNATION | 40 MILLIMETER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | TT-E-485,TYPE 4,X24087 FED SPEC SINGLE TREATMENT RESPONSE INSIDE |
| SURFACE TREATMENT | PHOSPHATE MANGANESE LOCATION NOT OTHERWISE SPECIFIED |
| SURFACE TREATMENT | ENAMEL SEMIGLOSS INSIDE |